Late at night, I'm reading through one of my study books when eventually I get bored and urges take over. So I also have a secret hentai book which helps me get into a different kind of mood. Eventually, I start to touch myself through my bright white frilly panties and then, when I get really aroused by touching myself, I take out my thing and start stroking it slow before going faster and faster, losing myself in arousal and eventually cumming when I can't hold back anymore